<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style type="text/css">
    
        .tab ul {
          overflow: hidden;
          padding: 0;
          margin: 0;
        }
        .tab ul li {
          box-sizing: border-box;
          padding: 0;
          float: left;
          width: 100px;
          height: 45px;
          line-height: 45px;
          list-style: none;
          text-align: center;
          border-top: 1px solid blue;
          border-right: 1px solid blue;
          cursor : pointer
        }
        .tab ul li {
          border-left: 1px solid blue;
        }
        .tab ul li.active {
          background-color: orange;
        }
        .tab div {
          width: 500px;
          height: 300px;
          display: none;
          text-align: center;
          font-size: 30px;
          line-height: 300px;
          border: 1px solid blue;
          border-top: 0px;
        }
        .tab div.current {
          display: block;
        }
      </style>
</head>
<body>
    <div id="app">
        <div class="tab">
            <!--  tab栏  -->
            <ul>
                <li @click='change(index)' :class='currentIndex === index ? "active" : "" ' :key='item.id' v-for='(item,index) in list'>{{item.title}}</li>
               
            </ul>
              <!--  对应显示的图片 -->
            <div :key='item.id' :class='currentIndex === index ? "current" : " " ' v-for='(item,index) in list'>
                <img :src="item.path">
            </div>
            
        </div>
    </div>
    <script src="./js/vue.js"></script>
    <script>
        const ve = new Vue({
        //  指定 操作元素 是 id 为app 的 
        el: '#app',
            data: {
                currentIndex:0,
                list: [{
                    id: 1,
                    title: 'apple',
                    path: 'img/apple.png'
                }, {
                    id: 2,
                    title: 'orange',
                    path: 'img/orange.png'
                }, {
                    id: 3,
                    title: 'lemon',
                    path: 'img/lemon.png'
                }]
            },
            methods:{
                change(index){
                    this.currentIndex = index
                }
            }
    })
    </script>
</body>
</html>